Tetrisphere (テトリスフィア) is a puzzle video game released for the Nintendo 64 in 1997. Developed by H2O Entertainment and published by Nintendo, the game is a variation of the classic Tetris formula. The game is set in a 3D spherical environment, with the objective being to clear the playing field of various shapes and sizes. The game features two modes: Puzzle Mode and Battle Mode. In Puzzle Mode, the player must complete levels by clearing the board of all objects. In Battle Mode, two players compete against each other to clear their respective boards. Tetrisphere features two control schemes. The first is the traditional control scheme, where the player uses the control pad to move the pieces and the A button to rotate them. The second is the analog control scheme, where the player uses the analog stick to move the pieces and the C buttons to rotate them. The game also features a variety of power-ups, which can help the player clear objects more quickly. Tetrisphere is an enjoyable puzzle game that offers a new twist on the classic Tetris formula. The 3D environment and the two control schemes provide a unique experience that players of all ages can enjoy. With its simple yet engaging gameplay, Tetrisphere is a great game for anyone looking for a fun and challenging puzzle experience.